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  1. sftyvlv1

    boiler stack

    How do I calculate the opening in the smoke box for my stack?
  2. sftyvlv1

    Hrt

    My little HRT, 10" sch 40 ERW pipe, A36 plate for tube sheets. A105 couplings and half couplings welded to shell. 200 psi MAWP. Home made hydro pump.
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